Normally the suggestions I see here are a bunch of nonsense, but you brought some really good ones.
3. This makes a lot of sense, both with and without Ken, because we had a whole quest for him to learn to swim to go to the beach, and in the end he doesn't go to the beach
4. Exactly, saying they're a "happy couple" and then delivering a scene with Gabriel without Haniya, but not delivering one of Haniya's without him is messed up
7. EXACTLY! It seems like the only thing this expansion did was waste time during exploration
8. This is actually a very good idea for Sofia, but I think it's quite unlikely considering it would be a lot of work
9. I AGREE COMPLETELY. Of all your suggestions, I think this is the most likely to happen